* 747 BCE – Epoch (origin) of Ptolemy's Nabonassar Era.
* 364 – Valentinian I is proclaimed Roman Emperor.
* 1266 – Battle of Benevento: An army led by Charles, Count of Anjou, defeats a combined German and Sicilian force led by King Manfred of Sicily. Manfred is killed in the battle and Pope Clement IV invests Charles as king of Sicily and Naples.
* 1658 – Treaty of Roskilde: After a devastating defeat in the Northern Wars (1655–1661), the King of Denmark-Norway is forced to give up nearly half his territory to Sweden to save the rest.
* 1794 – The first Christiansborg Palace in Copenhagen burns down.
* 1815 – Napoleon Bonaparte escapes from Elba.
* 1876 – Japan and Korea sign a treaty granting Japanese citizens extraterritoriality rights, opening three ports to Japanese trade, and ending Korea's status as a tributary state of Qing Dynasty China.
* 1909 – Kinemacolor, the first successful color motion picture process, is first shown to the general public at the Palace Theatre in London.
* 1914 – HMHS Britannic, sister to the RMS Titanic, is launched at Harland & Wolff shipyard in Belfast.
* 1917 – The Original Dixieland Jass Band records the first jazz record, for the Victor Talking Machine Company in New York.
* 1919 – President Woodrow Wilson signs an act of the U.S. Congress establishing most of the Grand Canyon as a United States National Park (see Grand Canyon National Park).
* 1920 – The first German Expressionist film and early horror movie, Robert Wiene's The Cabinet of Dr. Caligari, premièred in Berlin.
* 1929 – President Calvin Coolidge signs an Executive Order establishing the 96,000 acre Grand Teton National Park in Wyoming.
* 1935 – Adolf Hitler orders the Luftwaffe to be re-formed, violating the provisions of the Treaty of Versailles.
* 1935 – Robert Watson-Watt carries out a demonstration near Daventry which leads directly to the development of RADAR in the United Kingdom.
* 1936 – In the February 26 Incident, young Japanese military officers attempt to stage a coup against the government.
* 1946 – Finnish observers report the first of many thousands of sightings of ghost rockets.
* 1952 – Vincent Massey is sworn in as the first Canadian-born Governor-General of Canada.
* 1960 – A New York bound Alitalia airliner crashed into a cemetery at Shannon, Ireland, shortly after takeoff, killing 34 of the 52 persons on board.
* 1961 – Hassan II becomes King of Morocco.
* 1966 – Apollo Program: Launch of AS-201, the first flight of the Saturn IB rocket
* 1966 – Vietnam War: The ROK Capital Division of the South Korean Army massacres 380 unarmed civilians in South Vietnam.
* 1971 – U.N. Secretary General U Thant signs United Nations proclamation of the vernal equinox as Earth Day.
* 1972 – The Buffalo Creek Flood caused by a burst dam kills 125 in West Virginia.
* 1980 – Egypt and Israel establish full diplomatic relations.
* 1987 – Iran-Contra affair: The Tower Commission rebukes President Ronald Reagan for not controlling his national security staff.
* 1991 – Gulf War: United States Army forces capture the town of Al Busayyah.
* 1992 – Nagorno-Karabakh War: Khojaly Massacre: Armenian armed forces open fire on Azeri civilians at a military post outside the town of Khojaly leaving hundreds dead.
* 1993 – World Trade Center bombing: In New York City, a truck bomb parked below the North Tower of the World Trade Center explodes, killing 6 and injuring over a thousand.
* 1995 – The United Kingdom's oldest investment banking institute, Barings Bank, collapses after a securities broker, Nick Leeson, loses $1.4 billion by speculating on the Singapore International Monetary Exchange using futures contracts.
* 2004 – Republic of Macedonia President Boris Trajkovski is killed in a plane crash near Mostar, Bosnia and Herzegovina.